Straining press



June 5, 1928. 1,672,659

K. SOHLER STRAINING PRESS Filed April 29, 1926 4 Sheets-Sheet 1 t Fig. 1

June 5, 1928. "1,672,659

K. SOHLER STRAINING PRESS Filed-April 29. 1926 4 Sheets-Sheet June 5,1928 K. SOHLER STRAINING PRESS Filed April 29, 1926 4 Shgets-Sheet 5 WSWJune 5, 1928. 1,672,659

K. SOHLER STRAINING' PRESS Filed April 29, 1926 4 Sheets-Sheet 4 17 is15 a I Fig. 4

- out deviating from discharged liquid.

Patented June 5, 1928.

UNITED S ES H 1,672,659 PAT NT FIC KARL sonrna, or ama, NEAR .MAGDEBURG,GERMANY, AssIenon T0 ramp.

Kmirr GRUSQNWERK AKTIENGESELLSGHAFT, or MAGDEBURG, GERMANY.

s'rnarnme .ranss.

Application filed April 29,- 1926; Serial No.,105,537,"a1id it Germa y m7, 1925.

My invention relates to improvements in straining presses for extractingliquids from moist substances of various kinds and more particularly topresses of the type having a press chamber of annular cross sectionthrough. which the material is passed, said chamber being mainlycomposed of two cylinders, one of the latter or preferably both "beingperforated and the moist substances being continuously fed'and squeezedthrough the space between said perforated cylinders.

The object of my invention is to provide a press of this character whichis very simple in its construction. containing no complicated parts asworms safety couplings gear wheels and the like, and which can bemanufactured, sold and .maintained its place by means of a ring 11surroundlng at comparatively low cost. V

. Another object of my invention is to thus design the feeding anddischarging mechanism that the pressing action and the amount ofmaterial under treatment. will be kept automatically practicallyconstant duringthe whole operation of the press.

With'these and other..objects in view I have invented a straining pressfor continuous operation the essential features of which forms of myinvention are illustrated by way of examples.

Fig. 1 is a vertical sectional view'of the pr Figs. 2, 3, a

nd 4 are. similar sectional views showing three modified forms of thefeeding and actuating mechanism.

Like members of reference indicate 'similar parts in all the threemodified embodiments of my invention.

Referring to Fig. 1 or the drawings the annular press chamber 1comprises twowalls 2, 3 which are in their preferred formcylindricalybutwhich. can be made conical or in part conical andin partcylindrical; withthe essence of my invention,

"Said members 2,3 in their preferred cylindrical form are both providedwith perforations 4', representing outlets for the dis- The material tobe treated is continuously supplied through the hopper 5 and is fed andsqueezed into .the press through its intake 6 by means of a thumb 8carried by a nave member 16 spindlefl7.

by the thumb 8 upon the material is concentrated' to a rather limited.section of the whole'annular intake area6 of the press chamber, and thusthe feeding and pressing and mounted" on the rotary i r I 560 noted thatthe" pressure exerted action 'is' of a strictly one-sided or eccenf itsbottom edge and. allowing of a rotary tiltingxmotion 'of the cylinder'j2as indicated 8 in such manner that, the cylinder 2 will tilt towards therespective position of the thumb 8; i. e. the. left when'the thumb 8"passes along left side of the cylinder, 2 as indicated in Fig. 1' inbold lines.

It will'be noted that at the opposite (right) side the annular space 6will be then contracted in turn'accordingly, whereby the material undertreatment is highly'squeezed in radial direction and is compressed andcondensed in such manner that va substantially increased pressure occursalso in the axial direction through the whole press.

Owing to said combined radial and axial pressing effects the output ofthe liquid extracted from the material isconsiderably higher whencompared with the results obtainable heretofore.

The extractedliquid is discharged. through the outlet ports 17, 18*,while the material after treatment is discharged at the .dis-

charge" port 13 of the press chamber preferably. by means of knives orscrapers 12,

mounted on a rotary carrier 14.

Y I prefer to mount the scrapers 12 so as to atively to the presschamber and so as to project to a larger or smaller extent into thedischarge port 13.

7 In the embodiment of my invention shown i be capable of being liftedor lowered relin the drawings the. controlling mechanism for thescrapers 12 consists of a lever 15, engaging the carrier 14, the latterbeing slidably mounted on the shaft 7.

Figs. 2 and 3 show straining presses ac-- cording to this invention butof modified constructioi'i in which the inner straining member 3-istiltably mounted upon its-carrier and is postively actuated to itsrotary tilting motion. y

The means for imparting. apositive tilting motionto the inner strainingmember, 3 comprises a rotating eccentric 1-7 engaging the hub 9 of thestraining member? within: the rigidly mounted bearing '18. Said tiltingmotion of the shaft is trans-- mitted in turn to the inner strainingcylinder 8. In all other respects the construction and! theWOIlTlIlgCOlldltlOIlS of this modified press. are identical to-thatoutlined in. connection with Fig. 1'. I

Many structural: changes and modifications will offer themselves tothose skilled' in theart in carrying my invention. into practice. Thuse. g; the outer straining member 2 may. be given. a positive tiltingmotion e. g; through a' rotary driving mem ber' engaging the head ofsaid cylinder 2 at its innner periphery by means of a roller or a.similar element In thiscase the said roller shouldbe" arranged so as tobe closely before or behind the feeding thumb 8 with regard to itsrespective position on-the'shaft 7 and-thedirection olrotation. of thelatter, the object being-to provide an. enlarged. in take space in dueregister'withw thefeeding action.

Fig. 4 shows a further modification in which v both the inner and outerstraining members 3 and 4- are tiltable, having'spherical= bearingsurfaces and. 21 on. their. respective lower edges Tilting motion. isimparted to the inner strainingv member 3 by means of'an eccentric 23rigidly mounted onthe shaft. 7 under nave 22 of the pressing thumb8,.thenave 24 of the inner straining memberloosely, surrounding theeccentric. Tiltingmotion is imparted to the outer straining member 4 bythe action of the pressing thumb 8 on. the material in. the annularpressing space. The discharging knives Which operate in the outlet endof the annular pressing space and serve to scrape the material out ofthe same, are axially shiftable in the same manner as the pressingthumb8,.which1makesit possible to:reg ulate the pressure in the pressingspace. In

the embodiment shown thepnessinggdevice 8 and discharging scrapers 12are positively connected together by a system of levers in sucha" mannerthat with the automatic withdrawah of the pressing devicethe dischargingscrapers are simultaneously movedin' the same direction. The systemoflevers consistsof the. lever 26 which is pivoted to "the frame ofthepress at and" whose free lubly mounted upon the shaft "If theID'OVBDIQDi) of the material in the-pressing spaceis stopped by anincrease-in pressure,

the pressing device. rises which raises the lever 26 and causes thedischarging, scrapers to penetrate, deeper" into the outlet end; of thepress; thereby increasing: the discharge of material from the pressingspace, When the pressure in. the pressing space returns to normal, the.pressing thumb sinks ..again, forcing, the scrapers 12back. to theirnormal operating position- Thecenter of he tilting motion which. is

preferably in the longitudinal. axi'sjof. the

press and the: p-lanerespectively Where the tilting, of theSlZIiEtllllIlghlQHlbQL is zero may be located. at any distance belowthexfeeding member above or below the dischaaige port or thepressconiormably to special. requirements. 1 1

Having thus described. my. invention it shall be understoodthatIfwislinot tolimit myself to any particular structural details describedin the specification. and. shown in the drawings by. way. of examples,as various other changes than those indicatediabove may be madewithout'deviating from; the spirit and the leading. ideas oi my.invention.

What I claimis:

1. A straining press comprising a. pair of cages one inside the otherand forming between theme space for the reception of material tobepressed andgnieans for rela tively tilting saidl cages. I

2. A straining press comprising apalir. of cylindroidal cages of 1different diameter mounted one inside the. other. and: forming betweenthem an annular space fonthe reception of material to be pressed, andmeans for relatively. tilting; said. cages ti k :strainingv presscomprising a pair-of cylindroidal cages of different diameter mounted.one inside the other. andI-fonming; between them an annular space forthe resaid annular space is progressively squeezed and compressed in atransverse direct1on.

4:. A straining press comprlsing a pa r of cylindroidal. cages ofdifferent diameter.

mounted one inside the other and forming between them an annular spacefor the reception'of material to be pressed, and

means for imparting to one of said cages a rotary tilting motion suchthat it dev scribes a cone whose apex lies onthe longitudinal axis ofthe press 5. A straining press comprising .apair of cylindroidal cagesof different'diameter mounted one inside the other and forming betweenthem an annular space for the reception of material to be pressed, meansfor tilting one of said cages, and a circular guide surrounding saidtilting cage at the transverse plane where its'tilting motion is Zero.

6. A straining press comprising a pair of cylindroidal cages ofdifferent diameter mounted one inside the other and forming between theman annular space for the reception of material to be pressed, arevoluble shaft, an eccentric on said shaft,

and an eccentric ring rigid with one of said cages and cooperating withsaid eccentric, whereby a rotary-tilting motion can be imparted to thecage to which said eccentric ring is secured. a f

7. Astraining press comprising a pair of cylindroidal cages of differentdiameter I mounted one inside the other and" forming between them anannular space for the reception of material to be pressed, one of saidcages being freely tiltable, means for feeding material to be pressedinto one end of said annular space, and a pressing thumb working at theintake end of said annular space and adapted to be moved around the samefor pressing in new material to be pressed, whereby said tiltablecage'is tilted so as to squeeze the material in the side of said annularspace opposite to said thumb in a substantially transverse direction. I,

8. A straining press comprising a pair of cylindroidal cages ofdifferent diameter mounted one inside the other and forming betweentheman annular space for the reception of material to be pressed, saidcages being tiltably mounted, means for feeding material to be pressedinto one end of said annular space, a revoluble shaft within said cages,an eccentric on said shaft, an eccentric ring cooperating with sandeccentric and rigid with one of said cages, a pressing thumb secured onsaidshaft so as to rotate I therewith and extending into the intake endof said annular space, the point' of said eccentric furthest from theaxis of said shaft f being opposite to said pressing thumb.

9. A straining press comprising a pair of cylindroidal cages ofdifferentdiameter mounted one inside the other and forming between them anannulars'pace for the reception of material to be pressed, means for ofsaid annular space, an axially shifta-ble feeding material to. bepressed into one end end of said annular space and adapted to be movedaround the same for pressingin new material to be pressed, and yieldablemeans for forcing said thumblagainstv said material.

10. A straining press in accordance with claim 9 in combination with adischarging scraper adapted to be rotated the discharging end of saidannular space, said scraper being shiftable longitudinally of saidcages, and connections between said scraper and said pressing thumb suchthat the longitudinal position of said scraper is dependentupon thelongitudinal posi- .tion of said pressingthumb.

11. A, straining press in accordance with claim 9 in combination with adischarging scraper adapted to be rotated in the discharging end of saidannularspace, said scraper being] shiftable longitudinally of saidcages, connections between said scraper and said pressing thumb suchthat the 1on gitudinal position of said scraper is dependent upon thelongitudinal position of said ressin thumb and means for var in'theforce of said yieldable means.

12. A straining press for the purpose set forth and having the featuresoutlined in claim 9 characterized therein, that the pressing thumb isaxially slidably mounted with respectto said cages, and automatic meansfor controlling the working position of the pressing thumb,conformablyto the" required working pressure of the press.

The foregoing specification signed at Berlin, Germany this 15thday ofApril,

, ARL SOHLER.

